rule win_quickheal_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.quickheal."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.quickheal"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { c3 68fc1b0000 e8???????? 8be8 83c404 }
            // n = 5, score = 100
            //   c3                   | ret                 
            //   68fc1b0000           | push                0x1bfc
            //   e8????????           |                     
            //   8be8                 | mov                 ebp, eax
            //   83c404               | add                 esp, 4

        $sequence_1 = { a1???????? 8d7c244c f7d1 49 8d74244c c1e007 }
            // n = 6, score = 100
            //   a1????????           |                     
            //   8d7c244c             | lea                 edi, [esp + 0x4c]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   8d74244c             | lea                 esi, [esp + 0x4c]
            //   c1e007               | shl                 eax, 7

        $sequence_2 = { 8d7c245d 885c245c f3ab bf???????? 83c9ff f2ae }
            // n = 6, score = 100
            //   8d7c245d             | lea                 edi, [esp + 0x5d]
            //   885c245c             | mov                 byte ptr [esp + 0x5c], bl
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   bf????????           |                     
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]

        $sequence_3 = { 83d8ff 85c0 740e 8b3f 85ff 75c8 8b12 }
            // n = 7, score = 100
            //   83d8ff               | sbb                 eax, -1
            //   85c0                 | test                eax, eax
            //   740e                 | je                  0x10
            //   8b3f                 | mov                 edi, dword ptr [edi]
            //   85ff                 | test                edi, edi
            //   75c8                 | jne                 0xffffffca
            //   8b12                 | mov                 edx, dword ptr [edx]

        $sequence_4 = { 81c414040000 c3 8b4c2414 e8???????? 53 }
            // n = 5, score = 100
            //   81c414040000         | add                 esp, 0x414
            //   c3                   | ret                 
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   e8????????           |                     
            //   53                   | push                ebx

        $sequence_5 = { 23de 0bdd 8b6c2444 03dd 8d9c189979825a 8bc3 }
            // n = 6, score = 100
            //   23de                 | and                 ebx, esi
            //   0bdd                 | or                  ebx, ebp
            //   8b6c2444             | mov                 ebp, dword ptr [esp + 0x44]
            //   03dd                 | add                 ebx, ebp
            //   8d9c189979825a       | lea                 ebx, [eax + ebx + 0x5a827999]
            //   8bc3                 | mov                 eax, ebx

        $sequence_6 = { 23dd 0bf3 8b5c2444 03f3 }
            // n = 4, score = 100
            //   23dd                 | and                 ebx, ebp
            //   0bf3                 | or                  esi, ebx
            //   8b5c2444             | mov                 ebx, dword ptr [esp + 0x44]
            //   03f3                 | add                 esi, ebx

        $sequence_7 = { f2ae 8bca 4f c1e902 f3a5 8bca 8d842490050000 }
            // n = 7, score = 100
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   8bca                 | mov                 ecx, edx
            //   4f                   | dec                 edi
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bca                 | mov                 ecx, edx
            //   8d842490050000       | lea                 eax, [esp + 0x590]

        $sequence_8 = { 8d4400fe 66898424a4000000 66898424a6000000 0fbfc0 03c2 }
            // n = 5, score = 100
            //   8d4400fe             | lea                 eax, [eax + eax - 2]
            //   66898424a4000000     | mov                 word ptr [esp + 0xa4], ax
            //   66898424a6000000     | mov                 word ptr [esp + 0xa6], ax
            //   0fbfc0               | movsx               eax, ax
            //   03c2                 | add                 eax, edx

        $sequence_9 = { 897c2434 c1e902 f3a5 8bcd 83e103 f3a4 b907000000 }
            // n = 7, score = 100
            //   897c2434             | mov                 dword ptr [esp + 0x34], edi
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bcd                 | mov                 ecx, ebp
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   b907000000           | mov                 ecx, 7

    condition:
        7 of them and filesize < 553984
}